Exhaust manifold



p 9, 1930- I c. s. CHAPMAN 1,775,511

' EXHAUST mmroma Filed Kay 14, 1928 INVENTOR ATTORNEY.

Patented Sept. 9, 1930 V i UNITED STATES, PATENT OFFICE This invention relates to improvements in manifold, the same-having a series of ribs 24 internal combustion engines and more pardisposed transversely over its entire area to ticularly to types using a plurality of cylinact as radiators in conducting heat outwardly ders discharging their exploded gases into of the device.

an exhaust manifold. Interposed between the flanges 20,22 is 55 It is an object of the present invention to a gasket 25.to prevent escape of gases into provide a manifold structure composed .of the surrounding atmosphere, and at one end two longitudinal sections permitting separaof the upper section is a flanged opening 26v tion for cleaning and other purposes. to connect with an exhaust pipe.

A further feature is in the revision of The upper section 23 contains a straight 60 means for air cooling the gases in their pasconduit 27 communicating with the opening sage through the manifold, thereby reducing 26 and bounded at the bottom by a partition the back pressure and increasing the power of wall 28, terminating in an angular down the engine; turned extension 29, a similarly shaped ele- Another aim is to produce an exhaust maniment 30 being spaced therefrom and also 85 told that provides for the initial expansion from the end wall of the upper section. of the gases, as emitted from the exhaust ports Other angular extensions 31 and 32 reach of the engine, materially eliminating the noise from the partition 28 downwardly, as seen of the explosions as well as adding to the in Figure 2, and spaced below thepartition 20 efficiency of the engine. are sub-partitions 33 and 34, their forward These important advantages are accomends being turned angularly downward to the plished by the novel design, construction and level of the flange 22. arrangement of parts, as hereinafter de- Extending upward to the same level from scribed and shown in the accompanying drawthe lower section 15 are a series of divergent h 26 ing, forming a material part of this disclopartitions arranged in opposed pairs, as at sure, and in which --36, the same being arranged in combina- Figure 1 is a front elevational view of tion with the previously described elements an embodiment of the invention showing its to produce interrupted channels 37, 38, 39, 40 application. an 41 all of which receive the exhaust from 30 igure 2 is a central longitudinal sectional the inlets 16, 17 18 and 19 in the order of view thereof. the explosions, these channels being in open Figure3isatransverse sectional view taken communication with-the upper channel 27, on line 3-3 of Figure 2. causing the hot exhaust gases to become sensi- A conventional engine block is generally bly cooled and avoiding much of the noise 35 designated by the numeral 10 in the drawing, commonly incident "to engine operation. having a water connection 11 and at the front Although the preferred embodimentof this is an inlet manifold 12, its branches supplyinvention has been described in detail, it is ingga carburetted mixture to the cylinders. understood that minor changes in construc olts 13, set in the block 10, provide means tion and details thereof may be made with- 40 for tightening clamps 14 which are secured out de arting from the spirit or scope of the to the lower section 15 of an exhaust maniappen ed claims. fold this section being provided with down Having thus described my invention, whatI reaching inlets 16, 17, 18 and 19, one for each claim as new and desire to secure by Letters of the exhaust ports of the cylinders of the Patent, is a 45 en 'ne. 1. An exhaust manifold comprising a cashe upper straight flat edge ofthe lower ing having upper and lower sections, inlet section has an outwardly extending circumports in the lower section communicating ambient flange 20 having 0 enings to receive with ducts directed towards one end of the bolts 21 by which is secure a corresponding casing, angular baflles in the ducts, a longi- 50 flange 22 of the upper section 23 of the exhaust tudinal partition in the upper section forming a conduit thereabove,'baflies below said artition cooperating with the first named allies to direct gases from said ports, and a dischar e opening in the upper section for the conduit, said conduit being in open communication with the ducts at the end opposite the opening.

2. An exhaust manifold comprising-a cas-' ing having upper and lower sections, inlet ports in the lower section, an exhaust opening intheuppersectiomapaftition forming a conduit in said upper section leading to the exhaust opening, and a series of bafiies in both sections cooperating to cause gases from said ports to travel a sinuous course prior to entering the conduit. l 3. An exhaust manifold comprising a casing having upper and lower sections, inlet ports in the lower section, an exhaust opening in the upper section, a conduit leading thereto, a duct open to'said inlet ports and to said conduit at the end opposite said exhaust opening, a series of angular bafiles dis- I posed in said duct to produce a sinuous course therethrough, and a plurality of radiating ribs on the upper section.

' 4. An exhaust manifold comprising a casing,. having upper and lower sections, inlet ports in the lower section, an exhaust opening in the upper, section, a conduit leading thereto, there being a passage communicating between said ports and with said conduit at the end remote from said exhaust opening, andmeans adapted to air cool said upper section.

5. -An exhaust manifold comprising a casing having upper and lower sections, inlet ports in the lower section, an exhaust open ing in the up r section, a conduit leading thereto from s id ports, means in said conduit adapted to cause expansion of hot exhaust gases, and means for cooling the gases whereby back pressure and noise is measurabl decreased. testimony whereof I aflix my signature.

- CHAS. s. CHAPMAN, 

